Lets sink into the waves5/29/2023 ![]() How many of these points exist? due to destructive interference, the string does not vibrate at a node there's ALWAYS one more node 59. If a string is vibrating in four parts, there are points where it can be touched without disturbing its motion. Is interference a property of only some types of waves or all types of waves? Interference - the effect of one's wavesĪMPlitude on the AMPlitude of another wave occurs in ALL types of waves 58. In a standing wave on a string fixed at both ends, how is the number of nodes related to the number of anti-nodes? the number of nodes is always one greater than the number of ANTI-nodes 55. Which of the following wave characteristics remain unchanged when a wave crosses a boundary into a different medium: frequency, amplitude, wavelength, velocity, and/or direction? frequency would be the only one 29. Period of vibration must equal the time it takes the wave to move across the pond. You can make water slosh back and forth in a shallow pan only if you shake the pan with correct frequency. How much energy is required to make a pulse with twice the amplitude? 4 times the energy is required 67. Suppose you make a single pulse on a stretched spring. What happens to the wavelength of a wave as the frequency increases? wavelength DECreases 66. What happens to the period of a wave as the frequency increases? (time) period DECreases 65. What happens to the wavlength as you move your finger faster? the wavelength DECreases 64. Suppose you repeatedly dip your finger into a sink full of water to make circular waves. How does a spring pulse reflected from a rigid wall differ from the incident pulse? reflected pulse will be inverted, a crest will reflect as a trough. the wave is both relfected and transmitted, and the frequency stays the same 54. When a wave crosses a boundary between a thin and a thick rope, its wavelength and speed change, but its frequency does not. When a wave reaches the boundary of a new medium, what happens to it? the wave is both reflected and transmitted 53. Two crests are in phase, a crest, and trough are completely out of phase 52. When are points ona wave in phase with each other? When are they out of phase? Give an example of each points are in phase when they have the swame displacemnets and velocity, otherwise they are out of phase. ![]() The rate of energy transfer is DIRECTLY proportional to the square of the AMPlitude. Describe the relationship between the AMPlitude of a wave and the energy it carries. The AMPlitude represents the energy of a wave 51. What is the amplitude of a wave and what does it represent? The maximum displacement from the equilibrium position. How does the frequency of your hand compare with the frequency of the wave? They are both the same 50. Suppose you produce a transverse wave by shaking one end of a spring from side to side. The point is back to its original position 48. How does the position on the rope before the pusle arrrives compare to the point's position after the pulse has passed, if you send a pusle along a rope. It can by changing the frequency at where the waves originate 45. Waves are sent along a spring of fixed length.Ī) Can the speed of the waves in the spring be changed? Explain.ī) Can the frequency of a wave in the spring be changed? Surface wave - combo of both longitudinal and horizontal waves 43. Longitudinal wave - particles move back/forth What are the differences among transverse, longitudinal, and surface waves? Horizontal transverse wave - particles move up/down Waves (sound waves and light waves) What is the primary difference between a mechanical wave and an electromagnetic wave? EM waves can travel through a vacuum but a mechnical wave canNOT 42. How many general methods of energy transfer are there? Give two examples.) 2 methods: draw nodal and antinodal lines on diagram of waves interfering. draw waves diffracting going through an opening. zero Intereference is a property of _ waves all waves -draw transverse and longtiduinal waves and identify the crest, trough, compression, rarefaction, wavelength, and amplitude. amplitude Complete destructive intereference occurs when 2 waves are out of phase and the resultant displacement is _. electromagnetic - vacuum The _ of a wave is the maximum displacement from the equilibrium position. ![]() What is the primary difference between a mechnical wave and an electromagnetic wave? What they travel through: mechnical - matter.
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